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auth-cfg: Add RSA/PSS schemes for pubkey and rsa if enabled in strongswan.conf

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Also document the rsa/pss prefix.
This commit is contained in:
Tobias Brunner
2017-11-08 16:48:10 +01:00
parent 27a79326c7
commit fde0c763b6
4 changed files with 94 additions and 16 deletions
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src/libstrongswan/credentials/auth_cfg.c
+52 -14
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@@ -532,11 +532,35 @@ static void add(private_auth_cfg_t *this, auth_rule_t type, ...)
}
}
/**
* Create a constraint for RSA/PSS signatures
*/
static signature_params_t *create_rsa_pss_constraint(char *token)
{
signature_params_t *params = NULL;
hash_algorithm_t hash;
if (enum_from_name(hash_algorithm_short_names, token, &hash))
{
rsa_pss_params_t pss = {
.hash = hash,
.mgf1_hash = hash,
.salt_len = RSA_PSS_SALT_LEN_DEFAULT,
};
signature_params_t pss_params = {
.scheme = SIGN_RSA_EMSA_PSS,
.params = &pss,
};
params = signature_params_clone(&pss_params);
}
return params;
}
METHOD(auth_cfg_t, add_pubkey_constraints, void,
private_auth_cfg_t *this, char* constraints, bool ike)
{
enumerator_t *enumerator;
bool ike_added = FALSE;
bool ike_added = FALSE, rsa_pss;
key_type_t expected_type = -1;
auth_rule_t expected_strength = AUTH_RULE_MAX;
signature_params_t *params;
@@ -545,6 +569,9 @@ METHOD(auth_cfg_t, add_pubkey_constraints, void,
auth_rule_t type;
void *value;
rsa_pss = lib->settings->get_bool(lib->settings, "%s.rsa_pss", FALSE,
lib->ns);
enumerator = enumerator_create_token(constraints, "-", "");
while (enumerator->enumerate(enumerator, &token))
{
@@ -640,20 +667,10 @@ METHOD(auth_cfg_t, add_pubkey_constraints, void,
}
if (key_token && streq(key_token + strlen(key_token) - 3, "pss"))
{ /* these are not added automatically with 'pubkey' */
hash_algorithm_t hash;
if (enum_from_name(hash_algorithm_short_names, token, &hash))
{
params = create_rsa_pss_constraint(token);
if (params)
{
rsa_pss_params_t pss = {
.hash = hash,
.mgf1_hash = hash,
.salt_len = RSA_PSS_SALT_LEN_DEFAULT,
};
signature_params_t pss_params = {
.scheme = SIGN_RSA_EMSA_PSS,
.params = &pss,
};
params = signature_params_clone(&pss_params);
if (strpfx(key_token, "ike:"))
{
add(this, AUTH_RULE_IKE_SIGNATURE_SCHEME, params);
@@ -668,6 +685,27 @@ METHOD(auth_cfg_t, add_pubkey_constraints, void,
}
else
{
if (rsa_pss)
{
if (expected_type == KEY_ANY ||
expected_type == KEY_RSA)
{
params = create_rsa_pss_constraint(token);
if (params)
{
if (strpfx(key_token, "ike:"))
{
add(this, AUTH_RULE_IKE_SIGNATURE_SCHEME, params);
ike_added = TRUE;
}
else
{
add(this, AUTH_RULE_SIGNATURE_SCHEME, params);
}
found = TRUE;
}
}
}
for (i = 0; i < countof(schemes); i++)
{
if (streq(schemes[i].name, token))